Correct some Shopify Responsive Issues

I have a Shopify site which is basically fully functioning, but I have some small issues with it's responsive nature. It's a paid theme which has been quite heavily customised. You can see the site at infinitemultiple.com. The main issue is that the icons on top right are not always visible, sometimes they are off the edge of the window. Also the info icon is a png not svg, and behaves strangely (I have the svg available).

Dear Sir. I had read your descriptions about project. Kindly give me a chance, i would like to discuss more about project and sure everything clear. I am a developer very strong in below skills.
Relevant Skills and ExFlere

Hello,
I have checked the website [url removed, login to view] and both icons are showing on right top.
Let me know when these icons are not showing .
Relevant Skills and Experience
shopify, css
Please check some Flere

I have gone through your requirements and it will be done with best quality work.
I had done this exact type of job in the past.
We can start working now . please give a chance to work for you.
Relevant Skills and ExpFlere

Hello, hope you are doing well. I can do your job within next half an hour. I already understand what I need to do to fix your website's issues. If we can chat I can also show you my past work.
Relevant Skills and ExpFlere

Hi,
I just read your project requirement and I’m super confident to make it work.
My expertise in Custom Shopify theme with various complex tasks.
Almost 200+ stores developed by me in SHOPIFY.
Relevant Skills and ExFlere

Hi,
Can you share me your shopify website URL..?
I know you need to resolve Responsive Issues.
I have 10+ years Exps. in Shopify and all PHP framworks with javascript/jQ/Css3.
Relevant Skills and Experience
https:/Flere

Hello, I can fix your shopify site
I can assure you that I would the right person for this project.
I can start immediately
You can see my previous work on my portfolio
Please chat to understand more.
Relevant Skills Flere

I gone through brief description of your project post and Understand the base of it
Come forward for proceeding so then I'll fix this issue
Relevant Skills and Experience
I'm Shopify Certified
Proposed Milestones
£4Flere